package com.blak.black.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.blak.black.common.R;
import com.blak.black.dto.DishDto;
import com.blak.black.entity.Category;
import com.blak.black.entity.Dish;
import com.blak.black.entity.DishFlavor;
import com.blak.black.mapper.SetmealDishMapper;
import com.blak.black.service.CategoryService;
import com.blak.black.service.DishFlavorService;
import com.blak.black.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);

        //若数据库中新增菜品，获取redis中当前菜品种类下缓存的在售卖餐品数据，将其删除
        String keys = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(keys);

        return R.success("新增菜品成功");
    }

    /**
     * 查询菜品信息口味信息
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo,queryWrapper);
        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);

        //与新增菜品类似
        String keys = "dish_" + dishDto.getCategoryId() +"_1";
        redisTemplate.delete(keys);

        return R.success("修改菜品成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){

        List<DishDto> dishDtoList0 = null;
        //动态构造key
        String key = "dish_"+dish.getCategoryId()+"_"+dish.getStatus();
        //获取对应key对应的数据
        dishDtoList0 = (List<DishDto>) redisTemplate.opsForValue().get(key);
        //如果redis中key对应的数据不为空
        if(dishDtoList0!=null){
            return R.success(dishDtoList0);
        }


        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（启售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        //根据id查询正在售卖的菜品
        List<Dish> list = dishService.list(queryWrapper);

        //遍历菜品列表，并查询菜品分类信息和菜品的口味列表
        List<DishDto> dishDtoList = list.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId(); //分类id

            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //当前菜品id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //查询菜品的口味列表
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            //组装数据
            dishDto.setFlavors(dishFlavorList);
            return dishDto;

        }).collect(Collectors.toList());

        //将数据库中查到的数据放入redis中
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }

    /**
     * 删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> del(@RequestParam List<Long> ids){
        log.info("ids:{}",ids);

        dishService.removeWithFlavorSetmeal(ids);
        return R.success("删除成功");
    }

    /**
     * 改为停售
     * @param ids
     * @return
     */
    @PostMapping(path = {"/status/0"})
    public R<String> status0(@RequestParam List<Long> ids){
        log.info("ids:{}",ids);
        for (long id:ids){
            Dish dish = this.dishService.getById(id);
            dish.setStatus(0);
            this.dishService.updateById(dish);
        }
        return R.success("修改成功");
    }

    /**
     * 改为启售
     * @param ids
     * @return
     */
    @PostMapping(path = {"/status/1"})
    public R<String> status1(@RequestParam List<Long> ids){
        log.info("ids:{}",ids);
        for (long id:ids){
            Dish dish = this.dishService.getById(id);
            dish.setStatus(1);
            this.dishService.updateById(dish);
        }
        return R.success("修改成功");
    }

}
